本课题的目是探讨起重机梁声发射技术无损检测的可行性及声发射信号的特征。
The aim of this subject is to discover the feasibility of crane beam AET NDT and the characteristic of AE signal, which has never been reported in literature until today.
本课题首次将声发射监测技术应用于起重机梁的安全评价，从而扩展了声发射技术的应用领域。
This subject applies AET to safety assessment of crane beam first, so extend the application area of AET.
安装前要对起重机安装跨度，金属结构主梁的拱度、水平旁弯，小车轨道高低差、轨距偏差，桥架对角线等进行测量。
To install the crane span before installation, camber, level of metal structure of main girder bending, trolley rail height difference, gauge deviation, diagonal bridge survey.
根据已有的试验和研究成果，总结推荐了桥门式起重机焊接箱形梁的疲劳参数取值。
Based on test data and research achievement available in literature, the fatigue parameters of welded boxes of overhead and gantry cranes are recommended.
板和梁是冶金桥式起重机金属结构的基本组成单元，而这些金属结构的损伤多以板、梁的疲劳裂纹表现其故障形式。
Plate and beam is the element of over head traveling crane. Crack damage of plates and beams is the main fault forms of structure.
自动抓梁是水电站门式起重机的专用取物装置。
Automatic gripping beam is a specialised banging device for gantry cranes used at hydropower stations.
这种机器叫手动双梁起重机。
梁先生的三一公司生产起重机、挖掘机，受惠于近年来中国的建筑泡沫。
Mr Liang's company Sany, which manufactures cranes and excavators, has benefited in recent years from China's building boom.
采用空间薄壁板壳元与空间梁元混合离散模型对大吨位起重机钢丝绳缠绕卷筒进行有限元分析，将有限元方法与进退法优化方法耦合形成数值算法进而对卷筒进行优化设计。
The numerical method represents a coupling between the optimum method of advance and retreat and the finite element analysis for the design on large hoist drums of cranes that is an actual structure.
在分析影响起重机金属结构疲劳载荷情况的基础上，给出了起重机主梁起吊过程中不同阶段的动力学模型。
The paper builds the models at different stages of lifting operation on the basis of analysis of loads influencing crane structure fatigue.
采用起重机吊装预制梁，具有施工机具简单、易于操作、成本低、工期短、质量安全易于保证等优点。
Using crane to hoist and construct bridge is characteristic of simple in constructional machines, easy in operation, low in cost, short in construction time, safety and good quality.
主梁是葫芦门式起重机的主要受力部件，主梁的质量直接影响到整机的使用寿命。
The main beam is the main hoist gantry crane force components, main beam directly affects the service life of machine.
介绍了冶金起重机金属结构偏轨箱形模拟主梁的疲劳失效分析研究结果，提出疲劳失效的原因及改进措施。
Failure analysis of side rail box imitating chief beam of metallurgy crane was studied. Cause of fatigue failure and improving method were given.
某150t冶金起重机投产运行10多年后，主小车架马鞍形端梁局部产生了一些肉眼可见的裂纹。
The saddle-shaped end beams of the trolley structure of a 150 t metallurgical crane, which had been in use for 10 years, came to have a lot of visible cracks.
这种机器叫电动单梁起重机。
手动单梁起重机是桥式起重机的一种。
桥式起重机采用工字形截面作为主梁，使用多年后该结构形式的主梁上翼缘板和腹板连接的主焊缝及母材多处产生裂纹，甚至发生主梁断裂事故。
Cracks occurred in the main weld joining the web and upper wing panel of an overhead crane girder of I-section, some of which have expanded to the structure material and even led to girder fracture.
根据断裂力学及可靠性理论，提出了一种起重机焊接箱形梁存在裂纹缺陷的可靠度计算方法。
Based on fracture mechanics and theory of reliability, this paper offers the reliability calculation method for welded box beam having fracture.
本文论述起重机主梁的上拱度及预拱曲线的基本原理，介绍了国内外起重机技术标准中规定的上拱度值。
This paper discusses the question of crane main girder camber and the pre-cambering curve, introducing camber values stipulated in related crane standards in China and abroad.
在这种状况下该轨道梁是否具有足够的承载能力，成为能否增加一台同吨位的桥式起重机的关键。
Whether the track beam have enough loading ability or not in this kind of case become the key whether the same tonnage bridge crane can be increased.
介绍了基于系统分析的双梁桥式起重机桥架结构优化设计方法。
This paper introduces an optimization design method for overhead traveling crane structure with double bridge which is based on system analysis.
单梁起重机是桥式起重机的一种。
随机载荷作用下的疲劳破坏是起重机焊接箱形梁的主要失效形式之一。
For most of the bridge cranes, the failure of the structures result from the fatigue damage in the welded box beam under the action of random fatigue loads.
SL手动单梁起重机属轻小机种，适用于工厂设备安装、维修以及无电源的作业场所。
SL Type Manual Single-girder Crane is a light-small kind, which is applicable to equipment installation, maintenance and work sites without power source.
本文研究了单梁起重机在水平工作状态下系统的动特性以及影响因素，给出了计算公式和计算程序。
Overhead Cranes with Simple Girder's dynamic characteristics and influential factors have been studied under the horizontal work state. The calculation formula and the computer program are given out.
造船龙门起重机结构型式分为单梁和双梁。
The structure of shipbuilding gantry crane has single and double girder types.
针对DL Q 2 5 A轮胎起重机底架结构开裂的情况，采用ANSYS程序建立了主梁与支腿一体的板壳单元有限元分析模型。
For the cracking on the chassis of DLQ25A movable crane, the ANSYS program is used to establish the shell-elements FEA model of main beam with supporting leg.
L DA型电动单梁起重机适用于机械加工车间、仓库等场所作一般装卸和搬运物件的工作。
LDA cranes are suitable for hoisting, handing and transporting weights in machine shops and stores, etc.
本实用新型涉及一种双梁起重机。
本实用新型涉及一种双梁起重机。
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